CFR > Title 33 - Navigation and Navigable Waters > CHAPTER I—COAST GUARD, DEPARTMENT OF HOMELAND SECURITY > SUBCHAPTER O—POLLUTION (parts 151 to 159) > PART 157—RULES FOR THE PROTECTION OF THE MARINE ENVIRONMENT RELATING TO TANK VESSELS CARRYING OIL IN BULK > SUBPART E—Dedicated Clean Ballast Tanks on Tank Vessels (§157.200 to §157.228) > 157.210—Approved Dedicated Clean Ballast Tanks Operations Manual.